Merge tag 'pull-block-2022-06-14-v2' of https://gitlab.com/vsementsov/qemu into staging

Block jobs & NBD patches

v2: - add arguments to QEMUMachine constructor in test, to make it work
      on arm in gitlab pipeline
    - use bdrv_inc_in_flight() / bdrv_dec_in_flight() instead of direct
      manipulation with bs->in_flight

- add new options for copy-before-write filter
- new trace points for NBD
- prefer unsigned type for some 'in_flight' fields

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# gpg: Good signature from "Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>" [unknown]
# gpg:                 aka "Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>" [unknown]
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* tag 'pull-block-2022-06-14-v2' of https://gitlab.com/vsementsov/qemu:
  block: use 'unsigned' for in_flight field on driver state
  nbd: trace long NBD operations
  iotests: copy-before-write: add cases for cbw-timeout option
  block/copy-before-write: implement cbw-timeout option
  block/block-copy: block_copy(): add timeout_ns parameter
  util: add qemu-co-timeout
  iotests: add copy-before-write: on-cbw-error tests
  block/copy-before-write: add on-cbw-error open parameter
  block/copy-before-write: refactor option parsing

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 30 insertions, 1 deletions

diff --git a/qapi/block-core.json b/qapi/block-core.json
index 457df16638..2173e7734a 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -4185,6 +4185,25 @@
   'data': { '*bottom': 'str' } }
 
 ##
+# @OnCbwError:
+#
+# An enumeration of possible behaviors for copy-before-write operation
+# failures.
+#
+# @break-guest-write: report the error to the guest. This way, the guest
+#                     will not be able to overwrite areas that cannot be
+#                     backed up, so the backup process remains valid.
+#
+# @break-snapshot: continue guest write. Doing so will make the provided
+#                  snapshot state invalid and any backup or export
+#                  process based on it will finally fail.
+#
+# Since: 7.1
+##
+{ 'enum': 'OnCbwError',
+  'data': [ 'break-guest-write', 'break-snapshot' ] }
+
+##
 # @BlockdevOptionsCbw:
 #
 # Driver specific block device options for the copy-before-write driver,
@@ -4205,11 +4224,21 @@
 #          modifications (or removing) of specified bitmap doesn't
 #          influence the filter. (Since 7.0)
 #
+# @on-cbw-error: Behavior on failure of copy-before-write operation.
+#                Default is @break-guest-write. (Since 7.1)
+#
+# @cbw-timeout: Zero means no limit. Non-zero sets the timeout in seconds
+#               for copy-before-write operation. When a timeout occurs,
+#               the respective copy-before-write operation will fail, and
+#               the @on-cbw-error parameter will decide how this failure
+#               is handled. Default 0. (Since 7.1)
+#
 # Since: 6.2
 ##
 { 'struct': 'BlockdevOptionsCbw',
   'base': 'BlockdevOptionsGenericFormat',
-  'data': { 'target': 'BlockdevRef', '*bitmap': 'BlockDirtyBitmap' } }
+  'data': { 'target': 'BlockdevRef', '*bitmap': 'BlockDirtyBitmap',
+            '*on-cbw-error': 'OnCbwError', '*cbw-timeout': 'uint32' } }
 
 ##
 # @BlockdevOptions: